Heat-diffuser for steam-boilers.



Nv 833,642. PATENTED 0013.16, 1905.

A. SMALLWOOD. HEAT DIFFUSER FOR. STEAM BOILERS,

APPLICATION FILED JAN. 29. 1908.

4 SHEETS-SHEET l.

No. 833642 PATBNTED OGT.16, 1906.

A A, SMALLWOOD.

HEAT DIFFUSER FOR STEAM BOILERS.

APPLICATION FILED JAN. 29 1906 4 SHEETS-SHEET 2,

PATENTED OCT. 16, 1906.

A. SMALLWOOD. HEAT DIFFUSER FOR STEAM BOILERS.

APPLICATION FILED JAN 29. 1906.

4 SHEETSSHEET a.

PATENTBD OCT. 16, 1906.

A. SMALLWOOD. HEAT DIFFUSER FOR STEAM BOILERS.

APPLIOATION FILED JAN. 29, 1906.

4 S HEETS-SHEET -1- 53 box: and "other 'ueccmllueted ALFRED SMALLWQOD, or LGNDON, mot on.

HEAT DHFUSER m. ease-e2.

FQFl

Specification of Letters Patent,

Patented ()ct. 16, 1906.

Application file January 29, 1906. Qarial No. 208.536.

manliea for patents om: Brita-in, Patent 1m filo. 1,855, dated January 31, 190-5; Austria,

e dated December 13, 1905; Hun-- gar leete Ne. i-5,l?'7, dated December 1905;L1Lreniburg, Patent No.6,ii4" dated Jeri-ember 13, 1.9%,) of which the foil u specification. This invention relates to improvements in the meets for qeneratiiig and'iliilusing heat in ooimection. withsteam-boilers of the Len-- eeehire, Cor eh, wateetube, ()T OtlLBI' similar type, and which, in combination. with the improved generating of the heat, has for its obthe more perfect application of the heat 3 nice-tubes. of lie boiler. my toe iiereinefter-deeeiibed arrangement elumibers the onignited gases are first I from the tire-grate through a .ilireiirick, iirc-clziy, or the like coinlmetion-elmaii eer, whereby they are thoroughly 1 iited and into lieet i l previously 32 to the said limited have contact ith the l1(-Elt-i Jsorbing surfeceeftiic lioilcr'tube, such heated geese beingpeeeed l: tween the outside 01 the com leiistioii-cliaiiwi er and tlieiireide of the boiler: ,by which nit-ails the heat is not only 1, llplt(l to the tube, but also serves to ree tube formingtlie combustion-chamre or less iucmides oent state, thus assisting .41 the ignition of the iin'consumed e; parse tlrrcugggla the combustion chamber, in 'eddition to which the conilrue tioir-c amber is so constructed as to assist in ;th re iii-{lotion and ziceumulationef tiie'censi will] proportion eilient for igniting ti e ow @5111 their wilzu'nlier owing pessagc' through the 00ml [toilet the seine tin'ie so to plicetion and diii'u: of the 1 ,i anus venerated, the i2 and ieeted in such a manner to trans tire lie' -t to die boiler in a direct end rapid iiiez'. in order that this invention If? he clearly iiidersteod and more easily carried into pram tice, l have appended hereunto three sheets ports oi" the inner tube i111 provem en ts tliere't o.

geese liein allowed to tori-i or SUP QUTtlRg l 3 is a section through Fig. l on the line 3 1g. 4 is an enlarged section through one of he lire-tubes. ,.l ig. is also an enlarged section illustrating one form in Wliiclr-tlie shown in previous figures may be made up. Fig. 6 is a lengitw dinai section through one form oi water-tube boiler, illustrating the application of these Fig, 7 is a cross-section through Fig. 6 on the line 5 6.

In carrying this invention into effect and referring to the application of the improvements to at liancasliire boiler tl'ie grates or furnaces A ere formed within or adjoining the front end the furnace-tubes B and may be provided with a bridge (3, beyomt which eerinner ubc it, of ii'redirick, lire-clay, pond/ego, or other suitable material, is provided and supported in a position at or near the (zen of the furnace-tube by means oi? 2!, supportleg-division a such It manner that [2, space provided between the inner tube and the lioile 'tul)o. in addition to-thobot- Wis-ion a the space l)(.- tween the tubes is divided upon each side at 9', thus dividing the space into the lllllQOlOlflgitudiinti ilucs ll, J, and ii, the two lower ones, ileiid J, each new 'ing a quarter of the circumlerenco, while tli top one, K, occupies the other lie-l1, The inner or fire-brick 'tuliie l5) eoi'ninunicetos at the front end with the grate A em. forms the 31lOUStlUIlrl'flliulbel" F, the rear end being connected with the op flue er cl'iember, by which means the li ted ignited in the combustion-cl)eiribei first passed through the top lire lfl oricliamoer over the cemlmetion-cliamher and "mick again under the COHIbIlStTLUD-fll!EH13bfiiiby the bottom i'luesil and. J, the top flue i l be' q 1 c i'iiieeted Witt; the bottom rlues h and J at the s 2 7 able the heated gases to tel-1e this course. ily this Hill } wit its surrounding heatchan1bers H, J, and

K insures a more erfect a plication of the heat to the boiler t ough t 1e furnace-tubes.

The combustion-chamber tube E may be formed to a cone shape, so as to be reduced in diameter at the reverse end to that of the grate; and both the combustion and heat chambers ma be more or less extended in length, and t e interior of the combustionehamber may be provided with suitable projections or extensions for assisting in mixing up and igniting the-uncombusted ases in their passage through the coin ustionchamber.

The particular arrangement of the suportin -divisions e" e of the intermediate or ieat c amber, as hereinbefbre' described,

may be varied without departing from the nature of my said invention.

While the hereinbefore-described combustion chamber, which is formed ofi fire-brick, fire clay, or the like, forms an excellent accumulation and retarder of the'heat and will radiate'sufiicient heat for the ignition ot the ture, forms an imperfect conductor inconnection with the diffusion and transfer of the ad'- ditional heated gases generated to the boiler or other'articlc which it is required to heat, and it is one of the objectsof this invention to overcome such deficiency and to effect which the tube formin the combustionchamber is constructs with a fire-brick, fire-clay, or other lining which in workin of the furnace becomes incandescent and forms a'retarder and accumulator of a proportion of the heat which radiates into the combustio'n chamber sufiiciently to assist in ignitin the unconsumed gases as they pass through from the grate, as hereinbefore re- )ferred to, while around this lining a more or less heavy metal tube or casing E is provided and connected to the lining bydovetail or other projecting ribs e, which are provided upon the tube E and which fit into dovetail or other suitable recesses formed in the lining, the combustion-chamber bein formed insections or lengths to admit-of suc construction. By means of this metaltube or casing acon siderableroportion oi the heat of the combustion-c amber is diffused and transmitted to the fire-tube or other part of the boiler to be heated, in. addition to which the endof the combustion-chamberis connected with the annular space, and 'the whole of the remaining heated gases are passed between the outer lining E of the combustion chamber'and'the fire-tube B, the annular space being preferably divided to form a top and bottom flue through which the heated gases pass, as before described.

In the application of this invention towater-tube boilers the combustionchamber is equivalent space between the combustion shaped so as to be contained within, arranged around, or adjacent to the groups of water-1;; tubes, as may be rendered necessary to suit their particular arrangement, one form being i illustrated by Figs. 5 and 6, in which. he parflo titionE', for the combustion-chamben'isl constructed as ereinbefore described and; v arranged'with the metal cas' E, facingthe tubes B for the diffusion 0 -heat thereto-- while the remaining heat from the inside oi '75, the combustion-chamber is assed,.a s indie. cated by arrows, through t e chambers M .{TI and N, which contain the waterrtubes B! s: In allcases the width ofthe: annular.

chamber casing: E and the boiler B or'watere tubes B is so arra' ed that thetomeperature ofthe meiiimm ot the 00111111181 tion-chamber is limited by t e absorptionnofi' the-heat by the boiler or water-tubes, thus reventing the casing E from becoming suiciently heated to damage the bpilen'and' at the same time increasing the life of such, metal casing.

Having now described my invdntiom what 9o] I claim as new, andde'sire to secure. by Let ters Patent, is-- 1 1. A- means for generating and heat in connection with steamrboilers come prising a; furnace-tube, a furnace formed within and: adjoining the front end thereof 'j; an inner tube'o'fi mineral material capable becoming incandescent centrally located within the furnace-tube, supporting-divisions to maintain the innertube correctly Sir roof; tionedwithin thefumace-tube and to 2 m the space between the inner and furnacetubes into separate fines, means for the passage of the ases from the inner tube at the fr o' posite en thereofto the furnacev into one 1o5f of said fines, and other means for the assage of the gases from said flue into-the o flue or fluesat the opposite end thereofi to the first-mentioned means.

2. A means for generating and diffusing heat in connection with steam-boilers comprising a furnaco-tube, a furnace formed within and adjoining the front end: thereof an inner tube 01- mineral materialcapahle-o .r becomin incandescent centrally located ':-x5" within t e furnace-tube, supporting-dime s-ions tomaintainthe innertube-correctl sitioned within the furnace-tube and to: rm thespace between" the inner and furnace tubes into" separate flues, means-fertile pea I so sagegcii the asesfrom the inner tube-attire; opposite' en thereof to the furnace-into one 0 said flues, other means for the: of the gases from said flue into the ot or linear fines at the opposite e'nd thereof to thefimts mentioned means, and a metallic casing inclosing' the inner tube! and having dovetails I formed on its inner taco to enter dovetail grooves in the outer face of the inner tube.-

3. A means for generating and diffusing 13o 833,642 I I a heat in connection with steam-boilers comprising a furnace-tube, a furnace formed Within and adjoining the front end thereof, an inner tube of mineral material capable ol' becomingincandescent centrally located Within the furnace-tube, supportingdivisions to maintain the inner tube correctly positioned within the furnace-tube and to form the space between the inner and furnacetubes into separate flues,-Ineans for thepassage of the gases from the inner tube at the opposite end thereof to the furnace into one of said flues, other means for the passage of the gases from said flue into the other flue or flucs at the op'posite end thereof to the firstmentioned means, and a boiler inclosing the furnace-tube.

4. A means for generating and diffusing heat in connection with steam-boilers com- .prising' a furnacetube, a furnace formed within and adjoining the front end thereof, an inner tube of mineral material capable of ,mentioned means, a metallic casing inclosin the inner tube and havin dovetails forme( on its inner face to enter ovetail grooves in the outer face of the inner tube, and a boiler inclosing the furnace-tube.

In Witness whereof I have hereuntoset my hand in the presence of two witnesess.

ALFRED SMALLWOOD. Witnesses: I

WALTER Hv E. BARTLAM, JUSTUS Jones. 

